[BOT ISSUE] Google: add deprecation marker for shut-down gemini-3.1-flash-lite-preview

[github-actions]

Summary

gemini-3.1-flash-lite-preview is confirmed "Shut down" on Google's official models page and is absent from Google's pricing page, but the catalog entry has no deprecated or deprecation_date field. Without a deprecation marker, the model continues appearing as active in the catalog.

The stable replacement gemini-3.1-flash-lite is already in the catalog as a separate entry.

Affected Models

Model ID	Current Status	Correct Status	Line
gemini-3.1-flash-lite-preview	(no deprecation marker)	deprecated: true	~11216

The exact shutdown date is not published on the checked sources. Since the model is confirmed already shut down, setting deprecated: true directly is recommended rather than relying on deprecation_date + markModelsPastDeprecationDate().

Verification

Check	Status	Detail
Cross-source	✅	(1) Google AI models page — lists gemini-3.1-flash-lite-preview under "Previous models" with "Shut down" status; (2) Google AI pricing page — model is absent, confirming removal from active models
Already fixed	✅	Confirmed entry lacks deprecated and deprecation_date in current model_list.json
Duplicate check	✅	No open issue covers gemini-3.1-flash-lite-preview deprecation. Closed issues #540, #555, #657, #895 cover the stable gemini-3.1-flash-lite or other Gemini models only

Verification Notes

Field	Source	Notes
"Shut down" status	Google AI models page	Listed under "Previous models" section with "Shut down" badge
Absent from pricing	Google AI pricing page	Not listed among active or deprecated models
Stable replacement available	Catalog	gemini-3.1-flash-lite already in catalog (line ~6756) with google and vertex providers

Local Files Inspected

• packages/proxy/schema/model_list.json — gemini-3.1-flash-lite-preview (line ~11216) has no deprecated or deprecation_date
• packages/proxy/schema/models.ts — markModelsPastDeprecationDate() (line ~252) checks deprecation_date; or deprecated: true can be set directly

{
  "kind": "stale_metadata",
  "provider": "google",
  "models": ["gemini-3.1-flash-lite-preview"],
  "status": "deprecated",
  "model_specs": {
    "gemini-3.1-flash-lite-preview": {
      "format": "google",
      "flavor": "chat",
      "multimodal": true,
      "input_cost_per_mil_tokens": 0.25,
      "output_cost_per_mil_tokens": 1.5,
      "input_cache_read_cost_per_mil_tokens": 0.025,
      "displayName": "Gemini 3.1 Flash-Lite (Preview)",
      "reasoning": true,
      "reasoning_budget": true,
      "deprecated": true,
      "fallback_models": ["publishers/google/models/gemini-3.1-flash-lite-preview"],
      "supported_regions": ["global"],
      "max_input_tokens": 1048576,
      "max_output_tokens": 65536,
      "available_providers": ["google", "vertex"]
    }
  },
  "source_urls": [
    "https://ai.google.dev/gemini-api/docs/models",
    "https://ai.google.dev/pricing"
  ]
}

[github-actions]

Prepared catalog updates for gemini-3.1-flash-lite-preview. Updated models: gemini-3.1-flash-lite-preview.

Verification sources: https://ai.google.dev/gemini-api/docs/models, https://ai.google.dev/pricing
Verified metadata applied:

• gemini-3.1-flash-lite-preview: format=google, flavor=chat, displayName=Gemini 3.1 Flash-Lite (Preview), max_input_tokens=1048576, max_output_tokens=65536, pricing(input/output per 1M)=0.25/1.5, input_cache_read_cost_per_mil_tokens=0.025, providers=google|vertex, supported_regions=global, reasoning=true, reasoning_budget=true, multimodal=true, deprecated=true

Included in the daily batch PR: #1008